Having the same issue.
No local nor remote images are loading.
It works with no problem on Android in the same machine, as well as in my other Mac running Xcode 11.
It seems that the image size is extracted correctly and its canvas are put in the interface normally, but it does not draw anything (it's just that the place where the picture is supposed to be actually exists, it takes space, but is blank).
No warnings showed either in RN cli or in Xcode logs.